I use LVM-thin as the main storage and have repeatedly noticed that cloning VMs or recovering using proxmox often means that the VM is broken if LVM-thin is used as the target storage. In Windows 10, this means that after cloning, the VM boots only in recovery mode and does not see a drives. Today, HassOS stopped working for me and after recovering using Proxmox, I encountered the same problem: when I turn on the VM, it cannot boot, the partition table on the virtual disk is damaged. After a long brainstorm, I found out that the problem is in LVM-thin. When recovering to qcow2 or to zfs (which traditionally works painfully slow even on good hardware), the machines start up successfully from backup and continue to work normally even if later migrating disks to LVM-thin storage. I am sure that the problem is precisely software, but I could not find any similar topics.
proxmox-ve: 6.2-1 (running kernel: 5.4.41-1-pve) pve-manager: 6.2-4 (running version: 6.2-4/9824574a) pve-kernel-5.4: 6.2-2 pve-kernel-helper: 6.2-2 pve-kernel-5.3: 6.1-6 pve-kernel-5.0: 6.0-11 pve-kernel-5.4.41-1-pve: 5.4.41-1 pve-kernel-5.4.34-1-pve: 5.4.34-2 pve-kernel-5.3.18-3-pve: 5.3.18-3 pve-kernel-5.3.18-2-pve: 5.3.18-2 pve-kernel-5.0.21-5-pve: 5.0.21-10 pve-kernel-5.0.15-1-pve: 5.0.15-1 ceph-fuse: 12.2.11+dfsg1-2.1+b1 corosync: 3.0.3-pve1 criu: 3.11-3 glusterfs-client: 5.5-3 ifupdown: not correctly installed ifupdown2: 2.0.1-1+pve8 ksm-control-daemon: 1.3-1 libjs-extjs: 6.0.1-10 libknet1: 1.15-pve1 libproxmox-acme-perl: 1.0.4 libpve-access-control: 6.1-1 libpve-apiclient-perl: 3.0-3 libpve-common-perl: 6.1-2 libpve-guest-common-perl: 3.0-10 libpve-http-server-perl: 3.0-5 libpve-storage-perl: 6.1-8 libqb0: 1.0.5-1 libspice-server1: 0.14.2-4~pve6+1 lvm2: 2.03.02-pve4 lxc-pve: 4.0.2-1 lxcfs: 4.0.3-pve2 novnc-pve: 1.1.0-1 proxmox-mini-journalreader: 1.1-1 proxmox-widget-toolkit: 2.2-1 pve-cluster: 6.1-8 pve-container: 3.1-6 pve-docs: 6.2-4 pve-edk2-firmware: 2.20200229-1 pve-firewall: 4.1-2 pve-firmware: 3.1-1 pve-ha-manager: 3.0-9 pve-i18n: 2.1-2 pve-qemu-kvm: 5.0.0-2 pve-xtermjs: 4.3.0-1 qemu-server: 6.2-2 smartmontools: 7.1-pve2 spiceterm: 3.1-1 vncterm: 1.6-1 zfsutils-linux: 0.8.4-pve1
